(1) Explain your problem, don't simply post "This isn't working". What were you doing when you faced the problem? What have you tried to resolve - did you look for a solution using "Search" ? Has it happened just once or several times?
(2) It's also good to get feedback when a solution is found, return to the original post to explain how it was resolved so that more people can also use the results.
Thanks David for your kind words and giving me the details, I have not intention to tell a lie, but this is the proceduer that we take in the office.
We just update the cost based on what the Construction Leads give us.